javascript - java script Regular Expressions patterns problem -


my problem start like-

var str='0|31|2|03|.....|4|2007' str=str.replace(/[^|]\d*[^|]/,'5');

so output becomes like:"0|5|2|03|....|4|2007" replaces 31->5

but doesn't work replacing other segments when change code this:

str=str.replace(/[^|]{2}\d*[^|]/,'6');

doesn't change 2->6. missing here.any help?

here specific regex solution replaces number following first | pipe symbol number 5:

var re = /^((?:\d+\|){1})\d+/; return text.replace(re, '$15');

if want replace digits following third |, change {1} portion of regex {3}

here generalized function replace given number slot (zero-based index), specified new number:

function replacenthnumber(text, n, newnum) {     var re = new regexp("^((?:\\d+\\|){"+ n +'})\\d+');     return text.replace(re, '$1'+ newnum); }

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